Avaliação do potencial produtivo de dois cultivares de tomate visando diminuir a incidência de murcha bacteriana, no Iranduba-Amazonas

Abstract

The tomato, it belongs to the Solanaceae family, is one of the most consumed vegetables in Amazonas State, and the most marketed fruits come from the southern and southeast states, where weather conditions are more pleasant. Bacterial wilt, caused by the bacterium Ralstonia solanacearum, was established as one of the most important diseases for the tomato crop. Due to soil and climatic requirements, the tomato production is practiced with more intensity in the coldest and the driest regions in Brazil (Southeast, South and Midwest). In the humid tropical regions, the climatic conditions, permanently hot and humid, favors the survival of this bacterium that is the main reason that discourages the production of this crop in this region due to low productivity. With the purpose of indicating the technological innovations that enable the production of this vegetable in large scale, this study aims to evaluate the potential production and trade of two tomato cultivars and management techniques to decrease the incidence of bacterial wilt in protected cultivation systems, in the region of Iranduba - Amazon. The tomato cultivars used were C-38 and Santa Barbara, both developed by Embrapa Eastern Amazon, Belém/PA with a history of tolerance bacterial wilt, they were planted succeeding maize, in two treatments and in other, in successive crops. The data evidences the importance of combining techniques with resistant plant material from crops, because in the management systems that the tomato was planted in succession to maize, mortality was lesser than conventional management system and the productivity (approximately 22,65 t ha-¹) was higher than the average of the Amazonas State (approximately 14,60 t ha-¹). Comparated to the Santa Barbara cultivars, the C-38 cultivar showed higher productivity and characteristics of shape, weight and number of fruit with greater acceptance by the interal market